This is the first reported pedestrian killed by a self-driving car. It is the first fatal crash involving a self-driving Uber. A man was killed in May 2016 when his Tesla, operating in its semi-autonomous Autopilot mode, crashed into a semitrailer.

This is Uber's second major crash in Tempe involving a self-driving SUV. A car crashed into an autonomous Uber about a year ago, rolling the SUV on its side. Uber suspended its testing in Tempe, San Francisco and Pittsburgh following that crash.

A self-driving Uber in Pittsburgh was involved in a fender bender in September. The company determined neither the vehicle operator nor the self-driving software were at fault in the crash.

Pittsburgh's only other reported crash involving a self-driving vehicle happened in January when a box truck T-boned an Argo AI self-driving car.

Uber first started testing self-driving cars in Pittsburgh in 2016. By September of that year, it launched a pilot program in Pittsburgh to offer rides in self-driving Volvo SUVs to Uber customers. Uber expanded its testing of self-driving cars to Tempe and San Francisco. The company started testing cars in Toronto when it opened an artificial intelligence lab there.

Uber announced in September that its self-driving cars logged more than 1 million miles in its first year. The fleet drove 1 million more miles 100 days later.